Update 2020-01-30-newsletter-23.md

Added three stories from TWiR 2019-12-31-this-week-in-rust.md

Author: thejpster

content/2020-01-30-newsletter-23.md

@@ -45,6 +45,14 @@ If you want to mention something in [the next newsletter], send us a pull reques
 
 - [@jkristell] released version 0.6 of the [Infrared][infrared] crate and published a [blog post][infrared-blog] on how to add remote control support to an embedded Rust project.
 
+- [@lupyuen] has been doing very cool things with Rust and the PineTime smart watch - see [Porting druid Rust Widgets to PineTime Smart Watch](https://medium.com/@ly.lee/porting-druid-rust-widgets-to-pinetime-smart-watch-7e1d5a5d977a) and [Optimising PineTime’s Display Driver with Rust and Mynewt](https://medium.com/@ly.lee/optimising-pinetimes-display-driver-with-rust-and-mynewt-3ba269ea2f5c?source=friends_link&sk=4d2cbd2e6cd2343eed62d214814f7b81).
+
+- [The Raspberry Pi OS dev tutorial] got a new chapter on Kernel Unit, Integration and Console tests using QEMU
+
+[Porting druid Rust Widgets to PineTime Smart Watch]: https://medium.com/@ly.lee/porting-druid-rust-widgets-to-pinetime-smart-watch-7e1d5a5d977a
+[Optimising PineTime’s Display Driver with Rust and Mynewt]: https://medium.com/@ly.lee/optimising-pinetimes-display-driver-with-rust-and-mynewt-3ba269ea2f5c
+[The Raspberry Pi OS dev tutorial]: https://github.com/rust-embedded/rust-raspi3-OS-tutorials/tree/master/13_integrated_testing
+[@lupyuen]: https://github.com/lupyuen
 [@almindor]: https://github.com/almindor
 [@rubberduck203]: https://twitter.com/Rubberduck203
 [@jkristell]: https://github.com/jkristell